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However, after the Ming overthrew the Mongol Yuan, Zhu and Li's mathematical works went into disuse as the Ming literati became suspicious of knowledge imported from Mongol Yuan times.
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of the unknown by adding more lines on top and negative exponents by adding lines below the constant term. Decimals can also be represented.
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In later writings of Li Zhi and Zhu Shijie, the line order was reversed so that the first line is the lowest exponent.
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means "method of the heavenly element" or "technique of the celestial unknown". The "heavenly element" is the unknown
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Only recently, with the advent of modern mathematics in China, has the tianyuanshu been re-deciphered.
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equations. Some of the earliest existing writings were created in the 13th century during the
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Companion
Encyclopedia of the History and Philosophy of the Mathematical Sciences
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was deciphered and was important in the development of
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425:. Vol. 1. JHU Press. pp. 105–106.
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